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One-dimensional radar array optimization method based on non-contact vital signs monitoring system

A vital sign and monitoring system technology, applied in the field of radar, can solve problems affecting the radar pattern, optimize the design of the array element position and excitation distribution, and affect the performance of the radar system, etc.

Active Publication Date: 2018-11-13
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Because the array element position and excitation distribution in the radar transceiver array affect the radar pattern, which directly affects the performance of the entire radar system, there is currently no method to optimize the design of the array element position and excitation distribution for specific parameters

Method used

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  • One-dimensional radar array optimization method based on non-contact vital signs monitoring system
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  • One-dimensional radar array optimization method based on non-contact vital signs monitoring system

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Embodiment Construction

[0064] combine figure 1 , the present invention is based on the one-dimensional radar array optimization method of the non-contact vital signs monitoring system, based on the theory of non-contact vital signs, adopts particle swarm optimization (PSO) algorithm to carry out one-dimensional array optimization design for MIMO radar , in fact, this array arrangement method is not only applicable to MIMO radar arrays, but also to other virtual aperture radar arrays; this array arrangement method is not only applicable to PSO algorithms, but also applicable to other intelligent optimization algorithms. The specific steps are as follows:

[0065] Step 1, under the condition of considering the size of the heart, according to the specific carrier frequency of the radar system, determine the aperture of the array and the number of array elements, discretize the aperture of the radar one-dimensional array and use the binary system with constraints for the discrete aperture topology vecto...

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Abstract

The invention discloses an one-dimensional radar embattling optimization method based on a non-contact vital sign monitoring system. The method comprises the following steps of under the condition that a heart size is considered, according to a radar system carrier frequency, determining the numbers of apertures of an array and array elements, carrying out discretization processing on one-dimensional array apertures of a radar and using a binary system vector with a constraint condition to express the discrete apertures in a topology mode; substituting the acquired binary system vector to a MIMO radar direction diagram formula to determine an one-to-one correspondence relation with the direction diagram, using the direction diagram to solve a corresponding peak sidelobe level PSL so that the PSL expresses a function of a topology-structure binary system vector, and establishing a corresponding binary system optimization problem; and using an intelligent optimization algorithm to determine an optimized array topology structure and obtaining a corresponding optimal PSL direction diagram. In the invention, through the intelligent optimization algorithm, the PSL of the non-contact vital sign monitoring system radar can be effectively reduced so as to realize a one-dimensional radar embattling optimization design of the non-contact vital sign monitoring system.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a one-dimensional radar array optimization method based on a non-contact vital sign monitoring system. Background technique [0002] Human respiration, heartbeat, pulse, blood pressure, etc. are important indicators of vital signs, and are often used to judge the physiological health of the human body. If these indicators are abnormal, they often represent possible lesions in the human body of the tested person. Therefore, for the diagnosis and treatment of clinical medicine, real-time monitoring of these vital signs information is of great significance. At present, most monitoring systems are contact-based, but contact-based monitoring systems have many defects. Therefore, research on non-contact vital sign monitoring technology has entered the sight of scientists and has become a research hotspot in today's society. [0003] In recent years, foreign scholars have proposed a new...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88G01S7/42
CPCG01S7/42G01S13/88
Inventor 顾陈王芳李聪羚杨宇鑫洪弘李彧晟朱晓华
Owner NANJING UNIV OF SCI & TECH
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